What is the 4 in a Row game, how does it work?

According to the introduction of Tobias Eckert, 4 in a Row is a Casual game on the Android platform. There is currently a 3.9.1 version released on Mar 09, 2020, you can see the details below.

Play 4 in a Row against a friend (2 players) or the challenging CPU player. Whoever can connect four pieces in a row first on the board wins.

Game features
- 9 difficulty levels
- One and two player mode
- Switch levels while you play
- Unlimited Undos
- High res (HD) graphics
- Optimized for phones, tablets, Google TV and Android TV
- Two color schemes

Free, with ads.

With downloading the game, you explicitly agree to the Terms of Usage set forth at: http://www.apptebo.com/game_tou.html